Flood-gate.



PATENTED JULY 25, 1905.

G. RUHLMANN.

FLOOD GATE 00 1 lll lllll II ll. llllllllllul-ll-L APPLICATION FILED JAN. 5. 1905.

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UNITED STATES PATENT oFFIon.

FLOOD-GATE.

No. rsaess.

Specification of Letters Patent.

Patented July 25, 1905.

Application filed .l'anuaryb, 1905. Serial No. 239,828.

, To all whom, it may concern:

Be it known that LGnoRe RUHLMANN, a subject of the Emperor of Germany, and a resident of Strassburg, Alsace, Germany,have invented certain Improvements in Flood Gates, of which the following is a specification.

My invention relates to a flood-gate which serves to separate two water-receptacles one from the other in such a manner that the passage of water from the one receptacle into the other is impossible in any case, while from the latter receptacle water can flow under determined and regulatable conditions into the former.

In the upper part of the gate there is arranged an overflow opening which can be closed by means of a door and which opening allows of the outflow at a height of water reaching up to the threshold of the said over flow-opening from the second receptacle of the water collected in the first receptacle through the overflow-opening aforesaid, whereas when the level of the water rises in the second receptacle any backflow of the said water into the first receptacle is prevented by the closing of the gate. Moreover, the gate operates perfectly automatically, and after the complete discharge it will in all cases return to the initial position.

The invention finds useful applications in the discharge of flood-water from sewers into river-courses,for town-sewerage systems, also for navigation or irrigation purposes, Scc.

Referring to the accompanying drawings, Figure 1 shows a front elevation of the floodgate; Fig. 2, a section on the line A B of Fig. 1; Fig. 3, a section on the line E D of Fig. 1; Fig. 4, the same section with the flood-gate partly opened; Fig. 5, the same section with the entire flood-gate open.

The flood-gate consists of a revoluble flap a b, which is provided with the lever-arms it vertical with regard to the surface of the flap and with the lever arms 2' parallel with the surface of the flap. The lever-arms it bear a weight 6 and the lever-arms 2' a weight g. The upper part of the gate Z) has a door OZ, which is independently revoluble upon an axis 0 and covers a corresponding aperture provided with an overlapping threshold f. The gate can be applied to all places where it is desired that the contents of a watercourse K shall dischargeinto another watercourse Z, but that no water from the watercourse Z shall be able to flow into the watercourse K,

Fig. 3. The weight placed upon the lever it causes the discharge from the watercourse K, Fig. 5, only after the water therein has itself risen to such a height that its pressure is greater than that of the levers and weight 6 it. After discharge the gate closes again automatically.

As the weight 0 is adjustable, thedischarge height of the watercourse K can be fixed at will. The weight g on the lever-arms 2' serves to counterbalance the weight of the entire gate, so as to render the same more easy of operation. If the water in the channel Zrises higher, then there can still take place a discharge of the water in the watercourse K through the opening closed by the door d, Fig. 4:, without necessitating the opening of the entire gate, and in this case also the automatic closing of the gate d is provided for. In each case, therefore, the gate will prevent any flowing back of water from the watercourse Z into the watercourse K.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be'performed, I declare that what I claim is 1. In a floodgate pivoted at a suitable height, the arrangement of a door fitted in the upper half of the gate and automatically operative, substantially as described.

2. In a flood -gate pivoted at a suitable height, the arrangement of an automatic door in the upper part of the gate in combination with adjustable counterpoises on lever-arms placed vertically and parallel with the direction of the surface of the gate, substantially as described.

In witness whereof I have hereunto set my I 

